Lock for jacks.



No. 725,961. PATENTBD APR. 21, 1903.

- J. J. HEYS.

' LOOK FOR JAGKS.

APPLIOATION FILED NOV 21 1901 NO MODEL UNITED ST TES;

PATENT OFFICE.

JOHN J. HEYS, OE LYNN, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO MAURICE V.BRESNAI-IAN, OF LYNN, MASSACHUSETTS.

LOOK FOR JACK-S.

SPECIFICATION forming part of Letters Patent No. 725,961, dated April21, 1903. Application filed November 21,1901. $erialNo.83,185. (N0model.)

in the county of Essex and State of Massaohusetts, have invented certainnew and useful Improvements in Looks for Jacks, ofwhich the following isa specification.

This invention has for itseobject the provi sion of improved means forlocking the jacks in leveling or molding machines for boots and shoes.Such jacks are formed with two apertures, one extending upwardly in thebase and another extending inwardly from the front end of the base, forthe reception of the locking-pins, which are set at an angle to eachother. In boring the hole in the front of the jack it is dilficult onaccount of the liability of the boring-bit to be forced slightly out oftrue when the end of the bit engages the surface of the front of thejack, which in some cases is inclined, to form the apertures accuratelyin a large number of the jacks, and consequently the front locking-pincannot be forced into the aperture without difficulty or, if easilyengaged withthe aperture by reason of the aperture being located toonear thebaseline, without its having the operative pressure of the jackand mold. The presentinvention contemplates means for mounting the frontlocking-pin whereby it will have a slight transverse movement,

whereby its end may be easily'inserted in the aperture intended for iteven if the aperture is somewhat out of true.

On the accompanying drawings, forming-a part of this specification,Figure 1 represents a carrier havinga jack thereon and illustrates oneembodiment of myinvention for locking the jack. Fig. 2 represents asection on the line 2 2 of Fig.-.1.

On the drawings the jack is indicated at 5, and it is supported upon acarrier 6, which may be formed in any suitable way. The jack is providedwith a base 7, having a fiat surface which rests upon the flat top ofthe carrier. In the base of the jack are two holes or apertures 8 9, theformer projecting upward or at right angles to its flat base and thelower projecting inward from the front of the jack, the intention beingto have the two apertures at an angle of ninety degrees in relation toeach other. The carrier 6 is ical or pointed end. The screws-arearranged in axial alinement, and they are adapted to be locked againstmovement by nuts 17. Fulcrnmed upon the screws is a pivoted support 18,having an aperture from front and rear for-the reception of thelocking-pin 19, whose reduced end 20 is adapted to be inserted in theaperture 9 in thejack. It willbe observed that the reduced end 20 of thepin is slightly smaller in diameter than theinternal diameter of theaperture 9.

tudinally in its pivoted support,and it is held againstdisplacementordropping out by the knob or head 22 on one end and by the conical pointofthe screw 16, which enters a longitudinal groove-231m the pin and isadapted .to engage the end of the "shoulder 24 at the end of thegroovewhen the pin is withdrawn.

The pivotal support is formed with two fingers o'r'iiprojections 25 26at its front end, one above the. other, and between the finger 26 andthe projection 27 on the bracket 11 there is placed a helical spring 28,whose function is to hold the front end of the pivoted supportyieldingly upward. It will be observed from this construction that thepin 9 may be tilted to raise or lower its end 20 to bring it into alinement with the aperture 9 in case the said aperture is not accuratelylocated in the jack. Ordinarily the dislocation of the aperture would becomparatively slight, and yet with the usual form of locking-pin, whichis incapable of lateral movement, it would be impossible to force theend of the pin into the aperture. The spring 28 has a tendency to forcethe outer or front end of the pin upward, and when the said pin isengaged with The pin is formed with a shoulder 21 for engaging the frontof the jack when the pin is inserted in its aperture. The said pin isadapted to be moved longiits aperture the spring causes it to bind inthe aperture sufficiently to secure it yieldingly in place. There is nonecessity to have the pin moved sidewise, as the jack may be adjustedabout the pin to bring the aperture 9 into the vertical plane of theaxis of the pin and hence I make no provision therefor, it beingsufficient to provide for the movement of the pin in lines longitudinalof the pin 10. To raise the reduced end of the pin 19 into alinementwith the aperture 9, the thumb of the operator is placed upon the fingeror projection and is forced downwardly, the other end being employed tomove the said pin longitudinally when its end is in position to beforced into the said aperture 9.

Having thus explained the nature of the invention and described a way ofconstructing and using the same, although without attempting to setforth all of the forms in which it may be made or all of the modes ofits use, I declare that What I claim is l. The combination with a baseadapted to receive a jack, of a pin supported by said base and arrangedsubstantially in parallelism with said base, to enter an opening in thefront of said jack, and provisions for a transverse movement of the endof said pin,whereby it may accommodate variations in the openings inseveral jacks.

2. A locking device for jacks, consisting of a bracket, a springtensionsupport pivotally mounted in said bracket,and a longitudinallymovablepin passed through the said support.

3. A combination with a carrier having a pin to be inserted in the baseof the jack, of a pin adapted to enter an aperture in the front of thejack and arranged at an angle to the firstmentioned pin, and provisionswhereby the second-mentioned pin has a lateral movement to accommodateit to apertures which vary in position in the several jacks.

4. The combination with a base adapted to receive a jack, of a pinsupported by said base and arranged substantially in parallelismtherewith to enter an opening in the front of the said jack, and meansfor yieldingly preventing the accidental withdrawal of said pin fromsaid jack.

5. The combination with a base adapted to receive a jack, of alongitudinally-movable pin arranged substantially in parallelism withsaid base adapted to enter an opening in the front of said jack, asupport for said pin, a pivot for said support arranged transversely ofthe said pin, and a spring bearing against said support with a tendencyto swing it about its pivot so as to automatically secure the said pinagainst withdrawal after it is inserted in the opening in the jack.

6. A locking device for jacks consisting of a bracket adapted to beconnected to the jackcarrier, a support pivotally mounted in saidbracket, a spring inserted between said support and said bracket so asto swing the support about its pivotal axis, a longitudinallymovable pinpassed through said support,and means for limiting the longitudinalmovement of said pin.

In testimony whereof I have affixed my signature in presence of twowitnesses.

JOHN J. HEYS.

Witnesses:

M. B. MAY, GEORGE PEZZETTI.

